Bibliografias temáticas / Contamination

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Literatura científica selecionada sobre o tema "Contamination"

Autor: Grafiati

Publicado: 4 de junho de 2021

Última modificação: 29 de julho de 2024

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Artigos de revistas sobre o assunto "Contamination"

Felde, Nadja, Anne Gärtner, Stefan Schwinde e Sven Schröder. "Multifunctional contamination-resistant coatings". EPJ Web of Conferences 215 (2019): 02002. http://dx.doi.org/10.1051/epjconf/201921502002.

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Surface contaminations can critically affect the performance of optical surfaces, in particular with respect to light scattering, optical losses, and laser stability. Thus, avoiding contaminations and reducing contamination-induced effects is of particular interest in the manufacturing of optical systems. By combining a specific thin film design with a tailored structural design, contamination-resistant coatings with a high optical quality can be realized. Most important is the balance of self-cleaningand light scattering-relevant surface roughness components.

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Jalilzadeh-Amin, Ghader, Bahram Dalir-Naghadeh, Masoud Ahmadnejad-Asl-Gavgani, Aziz A. Fallah e Amin Mousavi Khaneghah. "Prevalence and Concentration of Mycotoxins in Animal Feed in the Middle East and North Africa (MENA): A Systematic Review and Meta-Analysis". Toxins 15, n.º 3 (10 de março de 2023): 214. http://dx.doi.org/10.3390/toxins15030214.

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This study seeks a comprehensive meta-analysis of mycotoxin contaminants in animal feed consumed in the Middle East and North Africa (MENA) region. The obtained articles were reviewed, and 49 articles that investigated the contamination of mycotoxins including aflatoxins (AFs), deoxynivalenol (DON), zearalenone (ZEA), T-2 toxin, fumonisins (FUM), and ochratoxin A (OTA), in feed samples or components of animal feed in the MENA region were selected. The titles of the final articles included in the study were meta-analyzed. Necessary information was extracted and categorized from the articles, and a meta-analysis was performed using Stata software. The highest contamination was in dry bread (80%), and Algeria was the most contaminated country (87% of animal feed), with the most mycotoxins contaminating AFs (47%) and FUM (47%). The highest concentration of mycotoxins in animal feed is related to FUM (1240.01 μg/kg). Climate change, economic situation, agricultural and processing methods, the nature of the animal feed, and improper use of food waste in animal feed are among the most critical factors that are effective in the occurrence of mycotoxin contamination in animal feed in MENA. Control of influential factors in the occurrence of contaminations and rapid screening with accurate identification methods to prevent the occurrence and spread of mycotoxin contamination of animal feed seem important.

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Paul, Dipayan, Henk A. Been, Anita Th Aerts-Bijma e Harro A. J. Meijer. "Contamination on AMS Sample Targets by Modern Carbon is Inevitable". Radiocarbon 58, n.º 2 (17 de fevereiro de 2016): 407–18. http://dx.doi.org/10.1017/rdc.2016.9.

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AbstractAccelerator mass spectrometry (AMS) measurements of the radiocarbon content in very old samples are often challenging and carry large relative uncertainties due to possible contaminations acquired during the preparation and storage steps. In case of such old samples, the natural surrounding levels of 14C from gases in the atmosphere, which may well be the source of contamination among others, are 2–3 orders of magnitude higher than the samples themselves. Hence, serious efforts are taken during the preparation steps to have the samples pristine until measurements are performed. As samples often have to be temporarily stored until AMS measurements can be performed, storage conditions also become extremely crucial. Here we describe an assessment of this process of contamination in background AMS samples. Samples, both as pressed graphite (on AMS targets) and graphite powder, were stored in various storage conditions (CO2-spiked air) to investigate the extent of contamination. The experiments clearly show that the pressed targets are more vulnerable to contamination than the unpressed graphite. Experiments conducted with enriched CO2-spiked laboratory air also reveal that the contaminating carbon is not only limited to the target surface but also penetrates into the matrix. A combination of measurements on understanding the chemical nature of the graphitization product, combined with long-available knowledge on “adventitious carbon” from the surface science community, brought us to the conclusion that contamination is to a certain extent inevitable. However, it can be minimized, and should be dealt with by sputter-cleaning the samples individually before the actual measurement.

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Wu, Xin, Fanan Suksawat, Allen L. Richards, Seangphed Phommachanh, Dusadee Phongaran e Sunpetch Angkititrakul. "Evaluation of the Containment of Antimicrobial-Resistant Salmonella Species from a Hazard Analysis and Critical Control Point (HACCP) and a Non-HACCP Pig Slaughterhouses in Northeast Thailand". Pathogens 9, n.º 1 (24 de dezembro de 2019): 20. http://dx.doi.org/10.3390/pathogens9010020.

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To evaluate the containment of antimicrobial-resistant (AMR) Salmonella contaminations of a HACCP slaughterhouse (HACCP SH) and a non-HACCP slaughterhouse (non-HACCPSH), 360 paired pig rectal (representing the farm pig status) and carcass samples (representing the contamination) were collected equally from the two slaughterhouses that serviced 6 and 12 farms, respectively, in Northeast Thailand (n = 720). The purified Salmonella isolates were serotype identified, antimicrobial susceptibility tested, and pulsed-field gel electrophoresis (PFGE) assessed. Four evaluations of two slaughterhouses were examined: (1) the means of slaughtering contamination rates (SCR) (to evaluate the contamination level by averaged farm SCRs): the HACCP SH decreased contamination (SCR: −48.89% ± 8.80%, n = 6), whereas the non-HACCP SH increased (SCR: 14.31% ± 9.35%, n = 12). (2) The serotype diversity: the HACCP SH decreased the diversity from the rectal group (110 isolates, 9 serotypes) to carcass group (23 isolates, 3 serotypes), whereas there was no decrease in the non-HACCP SH (rectal group (66 isolates, 14 serotypes) and carcass group (31 isolates, 10 serotypes)). (3) The AMR patterns: the HACCP SH decreased from rectal group (96 isolates, 7 patterns) to carcass group (22 isolates, 1 pattern), whereas there was no decrease from the non-HACCP SH rectal group (22 isolates, 7 patterns) to carcass group (48 isolates, 8 patterns). (4) The estimated indirect contamination rate (by serotype screening and PFGE confirmation): the HACCP SH was 60.87% (14/23), whereas the non-HACCP SH was 98.48% (65/66). This study indicates that both the slaughterhouses keep a high level of indirect contamination; the HACCP SH decreases Salmonella contaminations and reduces the AMR patterns, the non-HACCP SH increases contaminations.

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Wahab, M. H. A., N. A. M. Jamail, E. Sulaiman, Q. E. Kamarudin, N. A. Othman e S. M. N. S. Othman. "Space Charge and Electric Field Analysis on Contaminated XLPE Insulator". Indonesian Journal of Electrical Engineering and Computer Science 12, n.º 1 (1 de outubro de 2018): 370. http://dx.doi.org/10.11591/ijeecs.v12.i1.pp370-377.

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<p>Nowadays, XLPE cable has been widely used because it has better resistance than other cables. XLPE insulation has unique features including a high dielectric strength and high insulation resistance. A lot of researches based on hardware and software have been conducted to prove the effectiveness of XLPE cable such as AC and DC applications and Space Charge Distribution measurement under HVDC at High Temperature. This research focused on analysis of space charge and electric field on XLPE cable with effect of non-uniform contamination layer by using Quickfield Software. Non-uniform contaminations have been applied along XLPE cable using Arsenic Tribromide (AsBr3), Boron Bromide (BBr3), Ethylene Dichloride (CH2C1), Formic Acid (CH1O2), Formamide (CH3NO) and Alcohol element. Presence of these contamination elements represent of underground contamination. The size and layer of the contamination were non-uniform type. From the results, it is shown that lower dielectric constant of contamination will affect more on charge of XLPE insulation. As a conclusion, it can be seen lower dielectric constant value of contamination element greatly affecting the performance of XLPE insulation. Furthermore, size of contamination also influences the content of charge in contamination where the bigger the contamination size, the more charge contained in the contamination.</p>

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Chanana, A. D., e D. D. Joel. "Contamination of lung lymph following standard and modified procedures in sheep". Journal of Applied Physiology 60, n.º 3 (1 de março de 1986): 809–16. http://dx.doi.org/10.1152/jappl.1986.60.3.809.

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The sheep lung lymph fistula preparation of Staub et al. is reported to be contaminated by systemic lymph. The published estimates of contamination range from 5% (awake sheep) to 60% (anesthetized sheep). In view of these conflicting estimates, we investigated the pre- and postoperative contaminating sources, morphological and functional consequences of the proposed contamination reducing modifications, and base-line lung lymph flow in awake sheep following standard and modified cannulation procedures. Our morphological observations are not compatible with the higher estimates of contamination (25–60%). Evidence of lymph leakage from cauterized lymphatics was found. The lymphatics that appear after diaphragmatic cautery and partial resection of caudal mediastinal lymph node were found to constitute “new” contaminating sources. The lymph flow data from base-line and increased vascular pressure conditions were consistent with the reported low estimates of contamination (5%). We propose simple modifications of the standard procedure of Staub et al. which may be nearly as effective in reducing contamination by extrapulmonary lymph as the more invasive and/or traumatic modifications.

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Szpak, Dawid, e Barbara Tchórzewska – Cieślak. "Analysis And Assessment Of The Security Method Against Incidental Contamination In The Collective Water Supply System". Journal of KONBiN 34, n.º 1 (1 de setembro de 2015): 49–58. http://dx.doi.org/10.1515/jok-2015-0023.

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Abstract The paper presents the main types of surface water incidental contaminations and the security method against incidental contamination in water sources. Analysis and assessment the collective water supply system (CWSS) protection against incidental contamination was conducted. Failure Mode and Effects Analysis (FMEA) was used. The FMEA method allow to use the product or process analysis, identification of weak points, and implementation the corrections and new solutions for eliminating the source of undesirable events. The developed methodology was shown in application case. It was found that the risk of water contamination in water-pipe network of the analyzed CWSS caused by water source incidental contamination is at controlled level.

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Dvorakova, H., L. Valicek e M. Reichelova. "Detection of mycoplasma contamination in cell cultures and bovine sera". Veterinární Medicína 50, No. 6 (28 de março de 2012): 262–68. http://dx.doi.org/10.17221/5622-vetmed.

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Contamination of cell cultures and sera used for animal virus propagation with mycoplasmas represents a serious problem, especially in virology. Therefore specific control measures must be used. To achieve this we introduced PCR for the detection of mycoplasma species in cell cultures and compared its results with ELISA and microbiological culture. Seven mycoplasma species which are the most common contaminants of cell lines (Mycoplasma arginini, M. fermentans, M. hyorhinis, M. bovis, M. orale, M. hominis, and Acholeplasma laidlawii) were used to verify the method. Then we assessed five selected cell lines and three bovine sera by the PCR, ELISA and culture methods and compared the results. PCR was positive for all of the mycoplasma species tested. ELISA kit used (Mycoplasma detection kit, Roche, Germany) allowed detection of only four species of contaminating mycoplasmas (Acholeplasma laidlawii, Mycoplasma arginini, M. hyorhinis, and M. orale). All the methods detected contamination of the VERO and RK13 cell lines. The agents of contamination were determined by the species-specific ELISA kit as Mycoplasma arginini and M. orale, respectively. Other cell lines and sera tested were not contaminated with mycoplasma. The results confirmed that the PCR method used in the present study is a sensitive, fast and specific detection method of mycoplasma contaminations and is suitable for routine mycoplasma detection in cell cultures and bovine sera.

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Brnada, Snježana, Tanja Pušić, Tihana Dekanić e Stana Kovačević. "Impact of Fabric Construction on Adsorption and Spreading of Liquid Contaminations". Materials 15, n.º 6 (8 de março de 2022): 1998. http://dx.doi.org/10.3390/ma15061998.

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A contamination on a textile material is defined as an undesirable, local formation that deviates in appearance from the rest of the material. In this paper the relationship between the shape and surface of liquid contaminations and the firmness factor of woven fabric is investigated. The interdependence of constructional and structural parameters of raw and bleached cotton fabrics were analysed. The results show that selected contaminations are distributed differently, primarily depending on the construction characteristics of the fabric, type of contamination and hydrophilicity of cotton fabric.

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Silva, Leonardo Pessoa da, Josiane Bueno Salazar, Andréia Caroline Fischer da Silveira Fischer, Fernanda Ramos de Oliveira e Fernanda Chiarello Stedile. "Effectiveness of polymeric gloves in radioprotection against contamination in nuclear medicine". Brazilian Journal of Radiation Sciences 11, n.º 1A (11 de abril de 2023): 1–18. http://dx.doi.org/10.15392/2319-0612.2023.2187.

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When handling unsealed radioactive sources, radiological protection attention must be taken to avoid unnecessary exposure and radioactive contaminations, and an important and necessary practice to prevent such contaminations is the use of gloves when handling these sources. The present work aimed to determine the effectiveness of contamination protection provided by different types of disposable polymeric gloves used in Nuclear Medicine Service in Clinic Hospital of Porto Alegre, testing the main radiopharmaceuticals used at this site: [99mTc]sodium pertechnetate, [18F]FDG and [131I]sodium iodide. The analysis was performed using the wipe test inside gloves intentionally contaminated on the outside with these radiopharmaceuticals. The radiation detector used to measure the contamination was a NaI(Tl) scintillator well-type counter. The results indicate that three types of gloves analyzed protect the user from [99mTc]sodium pertechnetate and [18F]FDG contamination, for permanence times with the glove after contamination for up to 15 min (interval tested). For [131I]sodium iodide, gloves are completely effective in protection as long as they are used for a time interval after contamination of the external surface of up to: Latex – 5 min; Vinyl – 5 min; Nitrile – 10 min. Among them, the nitrile glove are the most effective, since contamination was not observed on the inner face for times equal to or less than 10 min; and, for an interval of 15 min, the percentage of permeation obtained was lower than the other two types: 3.3 times lower than vinyl glove permeation and 1.3 times lower of the latex glove permeation. It was also possible to estimate the skin dose rate due to contamination caused by iodine permeation for each glove case and time tested.

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Teses / dissertações sobre o assunto "Contamination"

Owen, Michael Paul. "Scatterometer Contamination Mitigation". BYU ScholarsArchive, 2010. https://scholarsarchive.byu.edu/etd/2310.

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Microwave scatterometers, which use radar backscatter measurements to infer the near-surface wind vector, are unique in their ability to monitor global wind vectors at high resolutions. However, scatterometer observations which are contaminated by land proximity or rain events produce wind estimates which have increased bias and variability, making them unreliable for many applications. Fortunately, the effects of these sources of contamination can be mitigated. Land contamination of backscatter measurements occurs when land partially fills the antenna illumination area. This reduces and masks the wind-induced backscatter signal. Land contamination is mitigated by quantifying the amount of contamination in a single observation using a metric referred to as the land contribution ratio (LCR). LCR levels which give rise to inadmissible levels of error in the wind estimates are determined and used to discard land-contaminated observations. Using this method results in contamination-free wind estimates which can be made as close to the coast as 5 km, an improvement of 25 km compared to previous methods. Rain contamination of scatterometer observations results from rain-induced scattering effects which modify the wind-induced backscatter. Rain backscatter effects are modeled phenomenologically to assess the impact of rain on the observed backscatter. Given the backscatter effects of wind and rain, there are three estimators: wind-only (WO), simultaneous wind and rain (SWR) and rain-only (RO), which have optimal performance in different wind and rain conditions. Rain contamination of wind estimates is mitigated using a new Bayes estimator selection (BES) technique which optimally selects WO, SWR, or RO estimates as they are most appropriate. BES is a novel adaptation of Bayes decision theory to operate on parameter estimates which may have different dimensions. The BES concept is extended to include prior selection and noise reduction techniques which generalizes BES to a wider variety of wind fields and further increase wind estimate accuracy. Overall, BES has wind estimation performance which surpasses that of either the WO or SWR wind estimates individually, and also provides a viable rain-impact flag.

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Coughtrey, Anna. "Exploring the fear of contamination : mental contamination in obsessive compulsive disorder". Thesis, University of Reading, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.542276.

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Calderin, Morales Duriem. "Modeling of Loose Contamination Scenarios to Predict the Amount of Contamination Removed". FIU Digital Commons, 2010. http://digitalcommons.fiu.edu/etd/228.

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The objective of this research is to evaluate the influence of the factors identified by the Johnson, Kendall and Robert’s theory that affect the strength of the detachment force necessary to remove a particle of contaminant from a surface, and the roughness of the surface in which the contaminant is present, on predicting the efficiency of removal of loose contamination. Two methods were used to reach this objective: the first method consisted of quantifying the contamination by weight and the second method of quantifying the contamination by counting alpha and gamma particles. As a result, it was determined that for particles of 5 μm, the interaction between contaminant-wipe and contaminant-surface were significant. However, for particles between 37-149 μm, the contaminant-surface interaction was the only significant interaction affecting the amount of contamination removed. The results obtained were already used at a contaminated site, confirming the prediction of contamination removed

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Scott-Fordsmand, Janeck James. "Biomarkers of soil contamination". Thesis, University of Reading, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.265176.

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Haner, Andrew Lloyd. "Iola, Kansas residential lead contamination". Thesis, Wichita State University, 2007. http://hdl.handle.net/10057/1536.

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In the late 1800’s and early 1900’s lead and zinc mining became prominent in Kansas, Oklahoma, and Missouri. With no knowledge of the effects that would impact the future, the mining companies continued to strip the land. With the discovery of lead and zinc ores in southeast Kansas, southwest Missouri, northeast Oklahoma in the late 1800’s a way to process the ores in a cheap way was needed. Natural gas in locations like Iola Kansas helped led to cheap ore processing and smelting. After the cheap fuel for the processing began to diminish in the early 1900’s, the multitude of smelters began to decrease. With the creation of the Environmental Protection Agency in 1970, concerns for the environment became a more than ever important issue. In the 1990’s, the EPA began to collect environmental impact data from areas potentially affected by mining, to access the effects of lead mining on residential areas in southeast Kansas and southwest Missouri. Thus, the methods of residential lead sampling were created. In Iola, Kansas the Kansas Department of Health and Environment performed tests to measure the extent that environmental impact from the smelters had on human residents of the town. With this evidence, the EPA was asked to conduct more testing, and to perform a cleanup of residential sites to help protect the environment and human health.
Thesis [M.S]: Wichita State University, College of Liberal Arts and Science, Dept. of Geology
"December 2007."

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Lee, Cheuk-hung, e 李卓雄. "Microbial contamination of enteral feeds". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2004. http://hub.hku.hk/bib/B31245596.

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Anderton, A. "Microbial contamination of enternal feeds". Thesis, University of Glasgow, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.377156.

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Fonseca, Viviane Grunert da. "Data contamination versus model deviation". Thesis, University of Sheffield, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.299265.

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Aguilar, Bobadilla Silvia E. "ECONOMIC ASPECTS OF HISTORICAL CONTAMINATION". Doctoral thesis, Vysoká škola ekonomická v Praze, 2008. http://www.nusl.cz/ntk/nusl-161826.

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The main scope of the work is to support a wider understanding of the achievements and limitations of economic analysis in historical contamination issues. The work describes how various schools of economics focus their study on environmental problems, specifically on Brownfields redevelopment. It presents the ideas of environmental economics, resource economics, free market environmentalism, institutional economics, political economy and ecological economics. The work includes a case study from the region of Ralsko in North Bohemia.

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Haner, Andrew Lloyd Gries John. "Iola, Kansas residential lead contamination /". Thesis, A link to full text of this thesis in SOAR, 2007. http://hdl.handle.net/10057/1536.

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Livros sobre o assunto "Contamination"

Pincher, Chapman. Contamination. London: Sidgewick & Jackson, 1989.

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Bogárdi, Istvan, Robert D. Kuzelka e Wilma G. Ennenga, eds. Nitrate Contamination. Berlin, Heidelberg: Springer Berlin Heidelberg, 1991. http://dx.doi.org/10.1007/978-3-642-76040-2.

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Jerry, Rafats. Heptachlor contamination. Beltsville, Md: U.S. Dept. of Agriculture, National Agricultural Library, 1986.

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Gupta, Ashim Das. Groundwater contamination. Bangkok: Environmental Systems Information Center, Asian Institute of Technology, 1993.

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British Columbia. Live Stock Branch., ed. Soil-contamination. Victoria, B.C: W.H. Cullin, 1997.

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Rafats, Jerry. Heptachlor contamination. Beltsville, Md: U.S. Dept. of Agriculture, National Agricultural Library, 1986.

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1954-, Abriola Linda M., International Association of Hydrological Sciences., International Commission on Groundwater, American Geophysical Union e International Association of Hydrological Sciences (3rd : 1989 : Baltimore, Md.)., eds. Groundwater contamination. Wallingford, OX: International Association of Hydrological Sciences, 1989.

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Bruce, Webb, International Association of Hydrological Sciences. Scientific Assembly, IAHS International Commission on Water Quality., International Commission on Groundwater, Unesco, World Meteorological Organization e Moroccan Water Resources Association, eds. Freshwater contamination. Wallingford, Oxfordshire, UK: IAHS, 1997.

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Piperbrook, T. W. Contamination zero. United States]: [publisher not identified], 2015.

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Jerry, Rafats. Heptachlor contamination. Beltsville, Md: U.S. Dept. of Agriculture, National Agricultural Library, 1986.

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Capítulos de livros sobre o assunto "Contamination"

Northcote, Thomas G. "Contamination". In Lake Titicaca, 551–61. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-2406-5_15.

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Galitskaya, I. V. "Contamination". In Selective Neck Dissection for Oral Cancer, 1. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-12127-7_69-1.

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Gabrys, Beata, John L. Capinera, Jesusa C. Legaspi, Benjamin C. Legaspi, Lewis S. Long, John L. Capinera, Jamie Ellis et al. "Contamination". In Encyclopedia of Entomology, 1045. Dordrecht: Springer Netherlands, 2008. http://dx.doi.org/10.1007/978-1-4020-6359-6_10006.

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Kerkstra, Randy, e Steve Brammer. "Contamination". In Injection Molding Advanced Troubleshooting Guide, 209–22. München: Carl Hanser Verlag GmbH & Co. KG, 2018. http://dx.doi.org/10.3139/9781569906460.023.

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Gooch, Jan W. "Contamination". In Encyclopedic Dictionary of Polymers, 884. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_13465.

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Galitskaya, I. V. "Contamination". In Encyclopedia of Earth Sciences Series, 184–85. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-73568-9_69.

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Tompkins, Joanne. "Contamination". In Unsettling Space, 87–126. London: Palgrave Macmillan UK, 2006. http://dx.doi.org/10.1057/9780230286245_4.

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Kerkstra, Randy, e Steve Brammer. "Contamination". In Injection Molding Advanced Troubleshooting Guide, 217–30. 2^a ed. München: Carl Hanser Verlag GmbH & Co. KG, 2021. http://dx.doi.org/10.3139/9781569908358.023.

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Kerkstra, Randy, e Steve Brammer. "Contamination". In Injection Molding Advanced Troubleshooting Guide, 217–30. München, Germany: Carl Hanser Verlag GmbH & Co. KG, 2021. http://dx.doi.org/10.1007/978-1-56990-835-8_23.

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Lock, Stephen. "Deliberate Chemical Contamination and Processing Contamination". In High-Throughput Analysis for Food Safety, 93–116. Hoboken, New Jersey: John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781118907924.ch04.

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Trabalhos de conferências sobre o assunto "Contamination"

Case, J. Christopher, e John A. Faria. "Contamination sources and means of mitigation: a focus on particulate contamination, airborne molecular contamination and biological contamination". In Optics & Photonics 2005, editado por Hal Amick. SPIE, 2005. http://dx.doi.org/10.1117/12.617818.

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Oyibo, Arome, e Mileva Radonjic. "Impact of Physical and Chemical Mud Contamination on Cement-Formation Shear Bond Strength". In ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/omae2014-24596.

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The purpose of this experimental study is to investigate the impact of physical and chemical mud contaminations on cement-formation bond strength for different types of formations. Physical contamination occurs when drilling fluids (mud) dries on the surface of the formation forming a mud cake while chemical contamination on the other hand occurs when drilling fluids which is still in the liquid form interacts chemically with the cement during a cementing job. Wellbore cement has been used to provide well integrity through zonal isolation in oil & gas wells and geothermal wells. It has also used to provide mechanical support for the casing and protect the casing from corrosive fluids. Failure of cement could be caused by several factors ranging from poor cementing, failure to completely displace the drilling fluids to failure due to casing. A failed cement job could result in creation of cracks/micro annulus through which formation fluids could migrate to the surface which could lead to sustained casing pressure, contamination of fresh water aquifer and blow out in some cases. To achieve proper cementing, the drilling fluid should be completely displaced by the cement slurry. However, this is hard to achieve in practice, some mud is usually left on the wellbore which ends up contaminating the cement. This study focuses on the impact of contamination on the shear bond strength and the changes in the mineralogy of the cement at the cement-formation interface.

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Khare, J., e W. Maly. "Contamination Diagnosis Using Contamination-Defect-Fault (CDF) Simulation". In ISTFA 1996. ASM International, 1996. http://dx.doi.org/10.31399/asm.cp.istfa1996p0109.

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Abstract This paper describes a simulation-based approach to contamination diagnosis. The methodology is based on the contamination-defect fault (CDF) simulator CODEF. CODEF is able to derive circuit-level faults resulting from contamination deposited on an IC cell during fabrication by simulating the manufacturing process flow. The application of CODEF in contamination diagnosis is illustrated with several examples.

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Suzuki, Y. "Artificial contamination test method on accumulated contamination conditions". In 11th International Symposium on High-Voltage Engineering (ISH 99). IEE, 1999. http://dx.doi.org/10.1049/cp:19990825.

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Vanhove, Emilie, Vincent Mouysset, Eudes Grosjean, Jean-Francois Roussel, Delphine Faye e Guillaume Rioland. "Modeling contamination at molecular level from elementary tests processing to flight contamination assessment". In Systems Contamination: Prediction, Control, and Performance 2020, editado por Carlos E. Soares, Eve M. Wooldridge e Bruce A. Matheson. SPIE, 2020. http://dx.doi.org/10.1117/12.2569120.

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Muscari, J. A. "Particulate Contamination Control". In 30th Annual Technical Symposium, editado por Robert P. Breault. SPIE, 1987. http://dx.doi.org/10.1117/12.939505.

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ROY, R., e D. HASTINGS. "Electric propulsion contamination". In 28th Joint Propulsion Conference and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1992. http://dx.doi.org/10.2514/6.1992-3560.

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Thornton, Mark M., e Cleveland C. Gilbert. "Spacecraft contamination database". In SPIE Proceedings, editado por A. Peter M. Glassford. SPIE, 1990. http://dx.doi.org/10.1117/12.22612.

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Peng, Gongmao, Zhicheng Guan, Fuzeng Zhang e Liming Wang. "The equivalent investigation of natural contamination and artificial contamination test". In 2009 IEEE 9th International Conference on the Properties and Applications of Dielectric Materials (ICPADM). IEEE, 2009. http://dx.doi.org/10.1109/icpadm.2009.5252434.

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Hongchuan Dong, Wenjie Xu, Bin Cao, Liming Wang e Zhicheng Guan. "Natural contamination deposition characteristics based on Natural Contamination Testing Station". In 2015 IEEE Conference on Electrical Insulation and Dielectric Phenomena - (CEIDP). IEEE, 2015. http://dx.doi.org/10.1109/ceidp.2015.7352055.

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Relatórios de organizações sobre o assunto "Contamination"

Mclean, Thomas Donaldson. Contamination Control Instrumentation. Office of Scientific and Technical Information (OSTI), julho de 2018. http://dx.doi.org/10.2172/1458971.

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Y. Yuan. Subsurface Contamination Control. Office of Scientific and Technical Information (OSTI), novembro de 2001. http://dx.doi.org/10.2172/836341.

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Y. Yuan. Subsurface Contamination Control. Office of Scientific and Technical Information (OSTI), dezembro de 2001. http://dx.doi.org/10.2172/803136.

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Unknown. GROUND WATER CONTAMINATION. Office of Scientific and Technical Information (OSTI), setembro de 1999. http://dx.doi.org/10.2172/769315.

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Swim, Cynthia, e Fancis D'Amico. Surface Contamination Mapping. Fort Belvoir, VA: Defense Technical Information Center, fevereiro de 1999. http://dx.doi.org/10.21236/ada393826.

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Overbay, Lauren. PPE and Contamination. Office of Scientific and Technical Information (OSTI), maio de 2022. http://dx.doi.org/10.2172/1870626.

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Pesaran, A. A., e C. E. Bingham. Desiccant contamination research: Report on the desiccant contamination test facility. Office of Scientific and Technical Information (OSTI), julho de 1991. http://dx.doi.org/10.2172/5423426.

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F.R. Faillace e Y. Yuan. Modeling for Airborne Contamination. Office of Scientific and Technical Information (OSTI), agosto de 2000. http://dx.doi.org/10.2172/893836.

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Ketsdever, Andrew, Sergey Gimelshein, Natalia Gimelshein e Taylor Lilly. Contamination and Micropropulsion Technology. Fort Belvoir, VA: Defense Technical Information Center, julho de 2012. http://dx.doi.org/10.21236/ada564003.

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Weller, Gunter, Patricia Anderson, Glenn E. Shaw, Richard Benner e Daniel Jaffe. Arctic Contamination Research and Assessment Program - Monitoring and Assessing Contamination in Arctic Alaska. Fort Belvoir, VA: Defense Technical Information Center, dezembro de 1997. http://dx.doi.org/10.21236/ada333303.

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